Re: SWT event question -- focus lost before selection

Joe Pluta wrote:

Ugh. This is a tough one, David.

Tell me about it :) SWT gives me a headache.

You want to see if the select event has fired when processing the
focus lost but I don't think you can because the select event hasn't
fired yet.

More specifically, I want to check to see if the select event WILL fire (so I can skip the validation logic in the focus event).

Have you tried simply logging the events to see if indeed that is the
case?

Yep, I'm sure it's happening.

It makes sense, of course ... the focus lost event on the current control should fire before the select event on the next control.

I just tried adding a filter listener attached to the displays Selection event ... which, I assumed, would fire before the events do. But it appears that the filters and events on control 1 fire before the filters and events on control 2.

I thought, for a minute, that the mouse event on the button might be getting fired before the focus lost event (by inspecting the stack in debug) ... but, no, the event is just added to the event queue.

Of course, there are always ways around this--such as the focus event
spawning a thread that in turn sends a message delayed a few
milliseconds that actually executes the focus logic but only if a
specific intervening event hasn't occurred--but it's an awful lot of
work.

That gives me a headache just thinking about it. I'm sure it would work ... but it would require that I completely re-engineer the panel that I'm working on.

Time for more digging.

david